:root {
    --white: #ffffff;
    --bg-light: #f8f8f8;
    --text-dark: #111111;
    --text-gray: #333333;
    --text-light: #666666;
    --border: #e5e5e5;
    --trans-ease: all 0.3s ease;
    --font-main: 'Source Sans Pro', 'Source Han Sans CN', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--trans-ease);
}

ul {
    list-style: none;
}

/* 导航栏 */
.main-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: 3rem;
}

.nav-menu a {
    font-size: 0.95rem;
    color: var(--text-gray);
    position: relative;
    padding-bottom: 4px;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--text-dark);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--text-dark);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 24px;
    height: 1px;
    background: var(--text-dark);
    transition: var(--trans-ease);
}

/* 轮播图 */
.hero-slider {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.2s ease;
    z-index: 1;
}

.slide.active {
    opacity: 1;
    z-index: 2;
}

.slide-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    transition: transform 6s ease;
}

.slide.active .slide-image {
    transform: scale(1);
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--white);
    z-index: 3;
    width: 90%;
    max-width: 800px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

.slide-content h1 {
    font-size: 3.5rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    letter-spacing: 2px;
}

.slide-content p {
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    color: var(--white);
    font-size: 0.8rem;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

@keyframes bounce { 0%, 100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 10px); } }

/* 通用布局 */
section {
    padding: 6rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.section-header p {
    color: var(--text-light);
}

/* 网格系统 */
.grid-cols-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.collection-card {
    display: block;
    cursor: pointer;
}

.card-image-wrapper {
    overflow: hidden;
    aspect-ratio: 3/4;
    margin-bottom: 1.5rem;
    background: var(--bg-light);
}

.card-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.collection-card:hover .card-image-wrapper img {
    transform: scale(1.05);
}

.card-content h3 {
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 视觉故事 */
.visual-story {
    background: var(--bg-light);
}

.story-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.story-content {
    padding: 2rem;
}

.story-content h2 {
    font-size: 2.2rem;
    font-weight: 300;
    margin-bottom: 2rem;
}

.story-content p {
    margin-bottom: 1.5rem;
    color: var(--text-gray);
    line-height: 1.8;
}

/* 按钮 */
.btn-link {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--text-dark);
    padding-bottom: 2px;
}

/* 筛选器 (系列页) */
.filter-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    border: none;
    background: none;
    font-size: 1rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--trans-ease);
}

.filter-btn.active, .filter-btn:hover {
    color: var(--text-dark);
}

/* 细节页布局 */
.details-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.details-sticky {
    position: sticky;
    top: 120px;
    height: fit-content;
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

/* 时间轴 (灵感页) */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
    align-items: center;
}

.timeline-item:nth-child(even) {
    direction: rtl;
}

.timeline-item:nth-child(even) .timeline-content {
    direction: ltr;
    text-align: left;
}

.timeline-content {
    text-align: right;
}

.timeline-img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    background: var(--bg-light);
}

/* 灯箱 */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox img {
    max-height: 90vh;
    max-width: 90vw;
    object-fit: contain;
}

/* 页脚 */
.main-footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 2rem;
    text-align: center;
    font-size: 0.9rem;
}

.main-footer p {
    opacity: 0.6;
}

/* 响应式 */
@media (max-width: 992px) {
    .slide-content h1 { font-size: 2.5rem; }
    .story-container, .details-layout { grid-template-columns: 1fr; gap: 3rem; }
    .details-sticky { position: static; margin-bottom: 2rem; }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; z-index: 1001; }
    .nav-menu {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        font-size: 1.5rem;
        transform: translateY(-100%);
        transition: transform 0.4s ease;
    }
    .nav-menu.active { transform: translateY(0); }
    .slide-content h1 { font-size: 2rem; }
    .timeline::before { left: 0; }
    .timeline-item, .timeline-item:nth-child(even) { display: block; padding-left: 2rem; border-left: 1px solid transparent; }
    .timeline-content { text-align: left; margin-bottom: 1rem; }
    .details-grid { grid-template-columns: 1fr; }
}